The player says "One, One!" ???

If I hold ffwd/rewind button while pressing power to turn it off, the player plays a sample of human voice saying: “One, one!”. What does that mean?

Thanks. 

The voice you hear is a fault message.  It would be very nice to actually have a list of the available faults in the user guide (hint!).  The message you hear may be referring to the depressed key.

Bob :smileyvery-happy: